code: def wait_for_job(self, job, timeout):
      container = job.data
      logger.debug("wait_for_job: %s", container.name)
  
      if config.merge_output:
          print(container.logs(stream=False).decode("utf-8"))
  
      # Can't set timeout to 0 for container.wait. Use a very
      # short wait time instead
      if timeout is not None and timeout <= 0:
          timeout = 0.05
      try:
          res = container.wait(timeout=timeout)
      except requests.exceptions.ConnectionError:
          # Docker SDK for Python document said that wait will raise
          # requests.exceptions.ReadTimeout exception, but actually it
          # raises requests.exceptions.ConnectionError.
          # See https://docker-py.readthedocs.io/en/stable/containers.html#docker.models.containers.Container.wait # noqa: E501
  
          logger.debug(
              "wait_for_job done(ConnectionError): %s", container.name
          )
          return None
      except requests.exceptions.ReadTimeout:
          # Incase it raises ReadTimeout
          logger.debug("wait_for_job done(timeout): %s", container.name)
          return None
  
      if config.merge_output:
          print(container.logs(stream=False).decode("utf-8"))
  
      logger.debug("wait_for_job done: %s", container.name)
  
      return res["StatusCode"]
  
imports: import logging
  import multiprocessing
  import os
  import sys
  import threading
  import time
  import uuid
  from os.path import expanduser
  import docker
  import psutil
  import requests
  import fiber
  import fiber.core
  import fiber.config
  from fiber.core import ProcessStatus
  from fiber.util import find_ip_by_net_interface, find_listen_address
label_desc: Use image node_id 6 for calling the Backend obj's underlying member method code with example usage: obj.wait_for_job(job, timeout) and returns: res, None, None